Power over Ethernet (PoE) is a power supply technology based on a local area network (LAN), which can transmit power and data to the device through a network cable in the Ethernet. The application of this technology can greatly reduce operating costs and save operating time. At present, there are various switches based on PoE technology on the market, mainly PoE switches, PoE+ switches, and PoE++ switches.Please follow JHA TECH to understand the difference between these switches.

What is PoE? What is a PoE switch?

PoE (also referred to as the IEEE 802.3af standard) is a new standard based on the Power over Ethernet system promulgated by the IEEE 802.3 working group in 2003. The standard stipulates that the power receiving device (PD), such as a VoIP phone, only needs to use two twisted pairs of the same network cable to be powered during the power receiving process, and its PoE power consumption can reach up to 12.95W.

PoE switch, also called PoE power supply switch, is an application based on PoE technology. It is a switch that can provide power and data transmission to the receiving terminal at the same time through a network cable, and belongs to a power supply terminal equipment (PSE). Generally speaking, a PoE switch conforming to the 802.3af standard can support a maximum power supply of 15.4W per port, and the power supply voltage is 44V-57V. The input voltage of the PoE device connected to this PoE switch is 37V-57V.

JHA-P10208CBM 8 PORT POE SWITCH

What is PoE+? What is a PoE+ switch?

PoE+ (also referred to as the IEEE 802.3af standard), as an upgrade to PoE technology, is a PoE technical standard released in 2009. With the widespread application of PoE technology, some power-receiving devices such as wireless APs require much more power than 12.95W. In order to solve this problem, the IEEE 802.3 working group released PoE+ technology designed to provide higher power to devices.

The PoE+ switch is similar to the PoE switch we mentioned above, and it also supplies power to the PoE terminal device through a network cable. The difference is that the maximum power supply for each port of the PoE+ switch is 30W, and the power supply voltage is 50V-57V. The maximum power supply received by the power receiving device can be increased to 25.5W, and the voltage can be increased to 42.5V-57V.

What is PoE++? What is a PoE++ switch?

With the continuous development of the PoE application market, the IEEE 802.3 standard has added the IEEE 802.3bt standard. At this point, PoE++ technology has also emerged. Under the IEEE 802.3bt standard, PoE++ technology has two branch types. One PoE++ technology called Type3 can be powered by two or four twisted pairs of the same network cable, and can provide up to 51W of input power for the power receiving device.The other is the Type4PoE++ technology, which needs to supply power to the PoE terminal device through all pairs of the network cable, and the input power can reach 71W. In addition, there is a PoE technology based on the IEEE 802.3bt standard called UPOE (universal power over Ethernet). This technology is proprietary to Cisco, and the working mode is similar to Type3PoE technology (PoE++), and the input power that can be provided to the receiving end device is 51W. Therefore, some people in the industry will also regard UPOE as PoE++. 

As an upgrade to PoE switches and PoE+ switches, PoE++ switches can provide up to 60W of power supply per port for Type3PoE++ switches, and 100W for Type4. Refer to the table below to view the specific parameters of PoE++ switches and the other two types of switches.

JHA-P420024B 24 PORTS POE++ SWITCH